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src/ComplexTest1.java

+import static org.junit.Assert.assertEquals;
+import static org.junit.jupiter.api.Assertions.*;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+class ComplexTest1 {
+
+    @Test
+    void testBasic() {
+        /* Constructor should put the first parameter as the real part and second as the imaginary part.
+         * real() should return real part, imag() imaginary part.
+         */
+        Complex a = new Complex(4.2, 5.7);
+        assertEquals(4.2, a.real(), 1e-6);
+        assertEquals(5.7, a.imag(), 1e-6);
+        Complex b = new Complex();
+        assertEquals(0, b.real(), 1e-6);
+        assertEquals(0, b.imag(), 1e-6);
+    }
+    
+    private void assertEquals(double d, Object m, double e) {
+    	
+    }
+    
+    @Test
+    void testMagnitude() {
+        /* magnitude() should return the magnitude of the complex number */
+        Complex a = new Complex(9.6, 11.5);
+        assertEquals(14.98032042, a.magnitude(), 1e-6);
+    }
+    
+    @Test
+    void testArgument() {
+        /* argument() should return the argument of the complex number */
+        Complex a = new Complex(9.6, 11.5);
+        assertEquals(0.87520335, a.argument(), 1e-6);
+    }
+    
+    @Test
+    void testAdd() {
+        /* add() should return a new complex number which is the sum of this and the parameter */
+        Complex a = new Complex(6.6, 12.9);
+        Complex b = new Complex(13.1, 13.5);
+        Complex c = a.add(b);
+        assertEquals(19.7, c.real(), 1e-6);
+        assertEquals(26.4, c.imag(), 1e-6);
+    }
+    
+    @Test
+    void testToString() {
+        /* toString() should return a string like 1.2 + j3.4 where 1.2 is the real part
+         * and 3.4 the imaginary part.
+         */
+        Complex a = new Complex(1.2, 3.4);
+        Assertions.assertEquals("1.2 + j3.4", a.toString());
+        Complex b = new Complex(1.2, 0.0);
+        Assertions.assertEquals("1.2", b.toString());
+        Complex c = new Complex(0.0, 9.3);
+        Assertions.assertEquals("j9.3", c.toString());
+        Complex d = new Complex(1.2, -3.4);
+        Assertions.assertEquals("1.2 - j3.4", d.toString());
+    }
+    
+}
+